Parcel and letter X-ray inspection unit



FIG. 1 is a front, top and right side perspective view of a parcel and letter X-ray inspection unit showing our new design;

FIG. 2 is a right side elevational view thereof, the left side being substantially a mirror image thereto;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof; and

FIG. 5 is a top plan view thereof. 

The ornamental design for a parcel and letter X-ray inspection unit, substantially as shown and described. 